new development in this period 350 BCE -100 CE? What role did caravan cities and, later, the Kushans play in the development of these exchange routes?...

To what extent were the Silk Roads a new development in this period 350 BCE -100 CE? What role did caravan cities and, later, the Kushans play in the development of these exchange routes? What new developments in interregional exchange do texts like the Periplus demonstrate? Explain why. Provide supportive details/evidence.